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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
284,545 260,219 25% 42% 23% 11% 33,533 94% 3% 2% 1%
- Simulation Users 5
10,820 4,254 47% 27% 16% 10% 4,464 92% 4% 1% 3%
- Interactive Users 6
62,438 57,079 30% 41% 19% 10% 9,814 96% 2% 1% 0%
- Download Users 7
243,956 239,091 25% 41% 23% 11% 27,047 95% 3% 2% 0%
Total Users (old defn) 8
73,303 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 10,820 users
Simulation Runs 535,714 jobs
Total CPU Time 15,622 days  
Total Wall Time 42,855 days  
Total Interaction Time 7,869 days  
Users with > 10 mins of CPU Time 4,033 users  
Avg. Number of Simulation Runs/User 50 jobs  
Avg. Time between First and Last Simulation 3,056 days  
Repeat Users with > 10 Simulation Jobs 5,342 users  
Repeat Users with > 3 Months 9 2,953 users  
Table 3: Miscellaneous Statistics
Domains Served 18,506
Cummulative Interactive User Sessions 10 263,517
Cummulative Session Time 12,026 days
Visitors 11 612,239
Visits 12 2,147,284
New Accounts 11,554
Max User Logins 1000 users on 2014-02-19
Web Server Hits 90,676,935
Table 4: Collaboration Usage
Shared Tool Sessions 13 131
New tools under development 48
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
284,545 260,219 25% 42% 23% 11% 33,533 94% 3% 2% 1%
- Registered Users 2
24,852 6,332 47% 28% 16% 9% 6,624 89% 6% 1% 4%
- Unregistered Interactive Users 3
38,233 35,976 23% 47% 21% 9% 4,004 95% 3% 2% 0%
- Unregistered Download Users 4
221,460 217,911 24% 41% 23% 11% 22,905 95% 3% 2% 0%

  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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